42520006 has 4 divisors (see below), whose sum is σ = 63780012. Its totient is φ = 21260002.

The previous prime is 42519959. The next prime is 42520021. The reversal of 42520006 is 60002524.

It is a semiprime because it is the product of two primes.

It is a super-3 number, since 3×42520006³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10630000 + ... + 10630003.

It is an arithmetic number, because the mean of its divisors is an integer number (15945003).

Almost surely, 2^42520006 is an apocalyptic number.

42520006 is a deficient number, since it is larger than the sum of its proper divisors (21260006).

42520006 is a wasteful number, since it uses less digits than its factorization.

42520006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21260005.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 42520006 is about 6520.7366148312. The cubic root of 42520006 is about 349.0313516059.

The spelling of 42520006 in words is "forty-two million, five hundred twenty thousand, six".